General
Wikipedia - Entry for Bejing National Stadium
Wikipedia - Discussion page

Official
Beijing Municipal Commission of Urban Planning - with all original proposals
Beijing Olympic Committee
ARUP - "Spectacular Bird's Nest opens in Beijing"

Press
China Daily - "Beijing National Stadium designers win award"
Telegraph - "Beijing Olympics opening ceremony: Guide to the 'Bird's Nest'
Guardian (photo selection) - "Beijing's Olympic architecture"
Der Spiegel (in English) - "Herzog On Building Beijing's Olympic Stadium"
New York Times - "Olympic Stadium With a Design to Remember"
Business Week - "Beijing Olympics: The Buildings"

Architectural Websites
AEC Magazine - "Pushing the limits in stadium"
Architecture Week "Beijing Bird's Nest - Architecture" (two parts + discussion)
"This is the first part of a two-part series about Beijing National Stadium.
Part one looks at the stadium from the architects' perspective, part two from the engineers'."
Part 1
Part 2
Discussion

About.com: Architecture - "The 2008 Olympic Stadium, the Beijing National Stadium"
Inhabitat - "BEIJING'S OLYMPIC STADIUM by Herzog and DeMeuron"

Blogs
3D Sports - "The Secret of the Beijing National Stadium"
Scott Burnham - "Who *really* designed Beijing's Olympic Stadium?"
BoingBoing - "Beijing stadium designer [Ai Wei Wei] gives Olympics -and Spielberg- the finger"
China Through A Lens - Four Great Buildings to Shape Olympic Beijing

Video
Film documentary by Schaub and Schindelm
Al Jazeera - Ai Wei Wei on Al Jazeera
Beijing Stadium on Discovery Channel

General
Wikipedia

Official
London 2012 Olympic Committee
HOK Sport (Architect)

Press
People's Daily Online (China) - "IOC chief clears London over stadium row"
CNN - "London unveils 2012 Olympic stadium"
Guardian - "London 2012 stadium revealed"
Guardian - "Trim the fat and cut the crap. Tough times demand an austerity Olympics"
Telegraph - "Boris Johnson's London 2012 stadium worry"
Telegraph - "Beijing Olympics: The Bird's Nest stadium"
Times - "Olympic stadium is deflated architecture at an inflated price"
The Sydney Morning Herald - "London Olympic stadium divides opinion"
BBC - "London unveils 2012 stadium plan"
BBC - "Hammers' Olympic move ruled out"
Chicago Sunday Times - "Could Chicago recycle London 2012 stadium?"

Architecture Websites
Building Design - "Olympic Stadium's latest design unveiled"
Building Design - "HOK's 2012 Olympic stadium design revealed - images and slideshow"
Building Design - "Stadium disappoints all round"
Architectural Record- "London's 2012 Olympics Stadium Panned"
World Architecture News -  "London 2012 to introduce new "mobile" stadium"
Building Design - "Should London's Olympic stadium be an iconic design?"

Video
BBC - "London unveils 2012 stadium plan"
You Tube (user created) - "London 2012 Olympic Stadium Unveiled"